Python 2.7 assertin gets error object has no attribute - assert

Question

I have Python 2.7.5 on my system python --version
I have a basic script that tries to verify something and assert if false. Here is the simple test I created that is failing.
Note Early on Asserts (pre 2.7) works fine.
import unittest
class TestSuite (unittest.TestCase):
def test002_last_Chat(self):
logger.info("This will select the chat with the user who we cleared. .")
a.selectMenu('Start a Chat')
self.assertEqual("im", "im") #This assert works fine
self.assertIn ("a", "apple") #FAILS
self.assertIn ("a", "pple") #FAILS
logger.info ("test01")\
if __name__ == '__main__':
logger.info("Running test: "+scriptName)
a = IPHONE()
b = BROWSER()
c = SAWS()
myTest = TestSuiteRunner(TestSuite, scriptName, testDescription, device=device)
myTest.runtest()
I get this error when I run it
Test complete (ERROR): test002_last_Chat (__main__.TestSuite)
(<type 'exceptions.AttributeError'>, AttributeError("'TestSuite' object has no attribute 'assertIn'",), <traceback object at 0x3>)
Traceback (most recent call last):
File "/Users/drlazor/Documents/AIM/6-17/oscar/qa/clients/TRAVOLTA/scripts_iphone/iphoneAIM_close.sikuli/iphoneAIM_close.py", line 194, in test002_last_Chat
self.assertIn ("a", "apple")
AttributeError: 'TestSuite' object has no attribute 'assertIn'
I am using this documentation http://docs.python.org/2/library/unittest.html#assert-methods as a guide.

Answer 1

There seems to be an issue with assertIn in some versions of Python. Here's an alternative that should work:
a = 'a'
apple = 'apple'
self.assertTrue(a in apple, '{} not in {}'.format(a, apple))